too slow play for aces? $20 180 players sit&go

[rapsu]

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero (t2385)
SB (t985)
BB (t2160)
UTG (t2110)
UTG+1 (t2690)
MP1 (t2595)
MP2 (t1855)
MP3 (t1750)
CO (t2035)

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">CO raises to t120</font>, Hero calls t120, SB calls t105, <font color="#666666">1 fold</font>.

Flop: (t390) A[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">CO bets t180</font>, Hero calls t180, SB calls t180.

Turn: (t930) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, CO checks, <font color="#CC3333">Hero bets t500</font>, <font color="#CC3333">SB raises to t685</font>, CO folds, Hero calls t185.

River: (t2300) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: t2300

I was hoping on the flop to induce the short stack SB to move all in.